Seth Godin writes a long post about 56 ways to get traffic to your blog, worth the read. Some of the tips are standard (be topical), others are there for irony and humor (don't write about your kids, write about your kids). More than one is there to generate attention (write in Chinese) to the changing popularity of blogs.
Andy 'GoBlogWild' Wibbels says Seth forgot one: "Use your blog to generate leads into your newsletter and your newsletter to generate leads into your blog."
The Blog Squad adds #58: Use your blog to drive people into your free telecalls, classes, and interviews; then on the ensuing podcasts, drive people back to subscribe to your blog and ezine.